diff --git a/.template.Debian/docker-entrypoint.sh b/.template.Debian/docker-entrypoint.sh
index 6f0f1316f..5a805fd07 100755
--- a/.template.Debian/docker-entrypoint.sh
+++ b/.template.Debian/docker-entrypoint.sh
@@ -61,6 +61,7 @@ docker_process_init_files() {
 			*.sh)     mysql_note "$0: running $f"; . "$f" ;;
 			*.sql)    mysql_note "$0: running $f"; docker_process_sql < "$f"; echo ;;
 			*.sql.gz) mysql_note "$0: running $f"; gunzip -c "$f" | docker_process_sql; echo ;;
+			*.sql.xz) mysql_note "$0: running $f"; xzcat "$f" | docker_process_sql; echo ;;
 			*)        mysql_warn "$0: ignoring $f" ;;
 		esac
 		echo
diff --git a/5.6/Dockerfile b/5.6/Dockerfile
index be6b54c21..b5ff1be5d 100644
--- a/5.6/Dockerfile
+++ b/5.6/Dockerfile
@@ -31,6 +31,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 # Sys::Hostname
 # Data::Dumper
 		perl \
+# install "xz-utils" for .sql.xz docker-entrypoint-initdb.d files
+		xz-utils \
 	&& rm -rf /var/lib/apt/lists/*
 
 RUN set -ex; \
diff --git a/5.6/docker-entrypoint.sh b/5.6/docker-entrypoint.sh
index 6f0f1316f..5a805fd07 100755
--- a/5.6/docker-entrypoint.sh
+++ b/5.6/docker-entrypoint.sh
@@ -61,6 +61,7 @@ docker_process_init_files() {
 			*.sh)     mysql_note "$0: running $f"; . "$f" ;;
 			*.sql)    mysql_note "$0: running $f"; docker_process_sql < "$f"; echo ;;
 			*.sql.gz) mysql_note "$0: running $f"; gunzip -c "$f" | docker_process_sql; echo ;;
+			*.sql.xz) mysql_note "$0: running $f"; xzcat "$f" | docker_process_sql; echo ;;
 			*)        mysql_warn "$0: ignoring $f" ;;
 		esac
 		echo
diff --git a/5.7/Dockerfile b/5.7/Dockerfile
index 88edd0629..714fdd2a2 100644
--- a/5.7/Dockerfile
+++ b/5.7/Dockerfile
@@ -33,6 +33,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 # Sys::Hostname
 # Data::Dumper
 		perl \
+# install "xz-utils" for .sql.xz docker-entrypoint-initdb.d files
+		xz-utils \
 	&& rm -rf /var/lib/apt/lists/*
 
 RUN set -ex; \
diff --git a/5.7/docker-entrypoint.sh b/5.7/docker-entrypoint.sh
index 6f0f1316f..5a805fd07 100755
--- a/5.7/docker-entrypoint.sh
+++ b/5.7/docker-entrypoint.sh
@@ -61,6 +61,7 @@ docker_process_init_files() {
 			*.sh)     mysql_note "$0: running $f"; . "$f" ;;
 			*.sql)    mysql_note "$0: running $f"; docker_process_sql < "$f"; echo ;;
 			*.sql.gz) mysql_note "$0: running $f"; gunzip -c "$f" | docker_process_sql; echo ;;
+			*.sql.xz) mysql_note "$0: running $f"; xzcat "$f" | docker_process_sql; echo ;;
 			*)        mysql_warn "$0: ignoring $f" ;;
 		esac
 		echo
diff --git a/8.0/Dockerfile b/8.0/Dockerfile
index 05c01f636..e135be89b 100644
--- a/8.0/Dockerfile
+++ b/8.0/Dockerfile
@@ -33,6 +33,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 # Sys::Hostname
 # Data::Dumper
 		perl \
+# install "xz-utils" for .sql.xz docker-entrypoint-initdb.d files
+		xz-utils \
 	&& rm -rf /var/lib/apt/lists/*
 
 RUN set -ex; \
diff --git a/8.0/docker-entrypoint.sh b/8.0/docker-entrypoint.sh
index 6f0f1316f..5a805fd07 100755
--- a/8.0/docker-entrypoint.sh
+++ b/8.0/docker-entrypoint.sh
@@ -61,6 +61,7 @@ docker_process_init_files() {
 			*.sh)     mysql_note "$0: running $f"; . "$f" ;;
 			*.sql)    mysql_note "$0: running $f"; docker_process_sql < "$f"; echo ;;
 			*.sql.gz) mysql_note "$0: running $f"; gunzip -c "$f" | docker_process_sql; echo ;;
+			*.sql.xz) mysql_note "$0: running $f"; xzcat "$f" | docker_process_sql; echo ;;
 			*)        mysql_warn "$0: ignoring $f" ;;
 		esac
 		echo